Monthly Archives: July 2011

Out of 523 people who have signed up for Round 4 of 90days, 130 people checked in for Week 5. Let’s take a look at how things have changed for us since the start of the round.

Overall weight distribution

Here’s the initial weight distribution of everyone who signed up originally and those who have checked in for Weeks 1 through 5:

And if we look at only the people who have checked in for Week 5, we get:

(lbs)

Week 0

Week 1

Week 2

Week 3

Week 4

Week 5

Avg

208.5

205.9

203.1

201.8

201.4

201.6

Std

50.8

50.6

49.7

50.6

48.0

47.4

(kg)

Week 0

Week 1

Week 2

Week 3

Week 4

Week 5

Avg

94.6

93.4

92.1

91.5

91.4

91.4

Std

23.0

22.9

22.6

23.0

21.8

21.5

We’ve lost an average of 6.92 lbs (3.14 kg) per person over the last four weeks. As a group, we’ve lost a total of 858 lbs (389 kg)! (For comparison, a rule of thumb for a healthy weight loss rate is 1-2 lbs (0.45-0.91 kg) per week, which would be 5-10 lbs (2.27-4.54 kg) for five weeks of progress. So we’re still right on track as a group!)

Fitting our weights to a normal distribution, it’s a little easier to see the shift in our group weight:

Weight distribution by gender

Let’s break this down by gender again. Looking at only the people who checked in for Week 5, there were 69 women and 55 men (plus 6 with an unknown gender).

The weight distributions for both genders are shown below.

Women

Women have lost an average of 5.82 lbs (2.64 kg) each since the start of the round, or a total of 401 lbs (182 kg) lost for these 69 women!

Men

Men have lost an average of 8.31 lbs (3.77 kg) each since the start of the round, or a total of 457 lbs (207 kg) lost for these 55 men!

Distribution of weight change

Here’s the distribution of weight change since the start of the round for everyone who checked in.

Broken down by gender:

Are any diets or exercises doing better than others?

On the sign-up form, there was a page of optional questions about which types of diets or exercises we were planning on following. This data isn’t necessarily very accurate, because there is no guarantee that a person actually follows the diet or exercise that they said they would. Plus, the questions were optional, so not everyone answered them. Still, it’s fun to look at some of the info that we can get from this.

Diet types

Calorie trackers

Exercise types

Activity trackers

Who’s still with us?

On the following plots, the number of people who checked in for Week 5 are compared with the number of people who did not check in. The plots are ordered by percentage of people retained. For example, of the 219 people who listed their goal as “improve body measurements,” 59 people checked in and 160 people didn’t check in, so 27% are still here. But only 1 out of the 7 people who chose “gain weight” checked in (14% retained).

Out of 523 people who have signed up for Round 4 of 90days, 150 people checked in for Week 4. Let’s take a look at how things have changed for us since the start of the round.

Overall weight distribution

Here’s the initial weight distribution of everyone who signed up originally and those who have checked in for Weeks 1 through 4:

And if we look at only the people who have checked in for Week 4, we get:

(lb)

Week 0

Week 1

Week 2

Week 3

Week 4

Avg

209.5

205.6

204.3

203.2

203.5

St Dev

51.5

50.5

49.5

50.4

49.0

(kg)

Week 0

Week 1

Week 2

Week 3

Week 4

Avg

95.0

93.2

92.7

92.2

92.3

St Dev

23.4

22.9

22.5

22.9

22.2

We’ve lost an average of 5.98 lbs (2.71 kg) per person over the last four weeks. As a group, we’ve lost a total of 885 lbs (401 kg)! (For comparison, a rule of thumb for a healthy weight loss rate is 1-2 lbs (0.45-0.91 kg) per week, which would be 4-8 lbs (1.81-3.63 kg) for four weeks of progress. So we’re still right on track as a group!)

Fitting our weights to a normal distribution, it’s a little easier to see the slight shift in our group weight:

Weight distribution by gender

Let’s break this down by gender again. Looking at only the people who checked in for Week 4, there were 80 women and 66 men (plus two with an unknown gender).

The weight distributions for both genders are shown below.

Women

Women have lost an average of 5.32 lbs (2.41 kg) each since the start of the round, or a total of 425 lbs (193 kg) lost for these 80 women!

Men

Men have lost an average of 6.94 lbs (3.15 kg) each since the start of the round, or a total of 458 lbs (208 kg) lost for these 66 men!

Distribution of weight change

Here’s the distribution of weight change since the start of the round for everyone who checked in.

Broken down by gender:

Are any diets or exercises doing better than others?

On the sign-up form, there was a page of optional questions about which types of diets or exercises we were planning on following. This data isn’t necessarily very accurate, because there is no guarantee that a person actually follows the diet or exercise that they said they would. Plus, the questions were optional, so not everyone answered them. Still, it’s fun to look at some of the info that we can get from this.

Diet types

Calorie trackers

Exercise types

Activity trackers

Who’s still with us?

On the following plots, the people who checked in for Week 2 are compared with the people who did not check in. The plots are ordered by percentage of people retained. For example, of the 242 people who listed their goal as “reduce body fat percentage,” 90 people checked in (41%). But only 2 out of the 5 people who chose “gain weight” checked in (29%).

Out of 516 people who have signed up for Round 4 of 90days, 158 people have checked in for Week 2. Let’s take a look at how things have changed for us since the start of the round.

Overall weight distribution

Here’s the initial weight distribution of everyone who signed up originally and those who have checked in for Weeks 1, 2, and 3:

And if we look at only the people who have checked in for Week 3, we get:

(lbs)

Week 0

Week 1

Week 2

Week 3

Avg

208.8

206.8

204.7

204.0

St Dev

52.9

55.5

54.0

50.6

(kg)

Week 0

Week 1

Week 2

Week 3

Avg

94.7

93.8

92.8

92.5

St Dev

24.0

25.2

24.5

23.0

We’ve lost an average of 4.82 lbs (2.19 kg) per person over the last three weeks. As a group, we’ve lost a total of 761 lbs (345 kg)! (For comparison, a rule of thumb for a healthy weight loss rate is 1-2 lbs (0.45-0.91 kg) per week, which would be 3-6 lbs (1.36-1.81 kg) for three weeks of progress. So we’re right on track so far!)

Fitting our weights to a normal distribution, it’s a little easier to see the slight shift in our group weight:

Weight distribution by gender

Let’s break this down by gender again. Looking at only the people who checked in for Week 3, there were 84 women and 66 men. (The remaining 8 check-ins have not filled out the signup form, so their gender is unknown and they have been excluded from the plots below.)

The weight distributions for both genders are shown below.

Women

Women have lost an average of 4.00 lbs (1.81 kg) each since the start of the round, or a total of 336 lbs (153 kg) lost for these 84 women!

Men

Men have lost an average of 5.75 lbs (2.61 kg) each since the start of the round, or a total of 425 lbs (193 kg) lost for these 66 men!

Distribution of weight change

Here’s the distribution of weight change since the start of the round for everyone who checked in.

Broken down by gender:

Are any diets or exercises doing better than others?

On the sign-up form, there was a page of optional questions about which types of diets or exercises we were planning on following. This data isn’t necessarily very accurate, because there is no guarantee that a person actually follows the diet or exercise that they said they would. Plus, the questions were optional, so not everyone answered them. Still, it’s fun to look at some of the info that we can get from this.

On the following plots, the average weight lost is shown for each group of people. Note that some groups have very low check-in counts. The average values are more meaningful for the larger groups.

Diet types

Calorie trackers

Exercise types

Activity trackers

Who’s still with us?

On the following plots, the people who checked in for Week 2 are compared with the people who did not check in. The plots are ordered by percentage of people retained. For example, of the 242 people who listed their goal as “reduce body fat percentage,” 90 people checked in (41%). But only 2 out of the 5 people who chose “gain weight” checked in (29%).